Monitoring Coverage Calculator
Calculate the percentage of services covered by active monitoring and estimate how many services have visibility gaps.
Inputs
Total number of distinct services/applications in your environment.
Services with active metrics scraping, dashboards and alerting configured.
Subset of services classified as business-critical (higher bar for monitoring completeness).
How many of the critical services actually have monitoring in place.
Overall Monitoring Coverage
71.8%
Critical Service Coverage
95.0%
Services With No Monitoring
24services
Critical Services With No Monitoring
1services
Rating
Gap in critical service coverage — highest priority to fix
Step by step
Uncovered services
85 − 61
= 24 services
Overall coverage: monitored / total × 100
61 / 85 × 100
= 71.8%
Critical service coverage
19 / 20 × 100
= 95.0%
Rating
based on gaps and coverage thresholds
= Gap in critical service coverage — highest priority to fix
How it works
Overall coverage = monitored_services / total_services × 100, but treating all services as equally important hides the highest-risk gaps — a service classified as business-critical with no monitoring is a much bigger operational risk than a low-traffic internal tool with no monitoring. This calculator reports both the overall coverage percentage and a separate critical-service coverage figure, and flags any gap in critical coverage as the top-priority finding regardless of overall percentage.
Formula
coverage_percent = (monitored_services / total_services) × 100
- monitored_services
- Services with active monitoring (metrics, alerts, dashboards)
- total_services
- Total services in the platform
Frequently Asked Questions
Why treat critical service gaps as automatically top priority?
A single unmonitored critical service can cause a major undetected outage, while many unmonitored low-priority services collectively pose less risk — prioritizing by business impact rather than raw percentage avoids spending effort on low-value instrumentation while critical blind spots persist.
What counts as 'monitored' for this calculator?
This model treats a service as monitored if it has active metrics scraping, at least a basic dashboard, and some alerting — a service with only logs but no metrics/alerts, or only a dashboard nobody's alerting on, arguably shouldn't count as fully covered.
How do I find unmonitored services in practice?
Cross-reference your service catalog/CMDB or Kubernetes namespace list against your Prometheus service-discovery targets or Grafana dashboard list — services present in the former but absent from the latter are your gap list.
Does 100% coverage mean monitoring is 'done'?
No — coverage measures breadth (is there *any* monitoring) not depth or quality (are the right SLIs tracked, are alerts well-tuned). Pair this metric with alert noise score and SLI/SLO tracking for a fuller picture of monitoring maturity.